Compressor



April 1924.

M. F. JURUICK COMPRESSOR Filed July 5, 1922 f iif' ?atented Apn'l, 1924.

UNHTED STATES MAXIMILIAN F. J URUIGK, OF .ALLENTOWN, PENNSYLVANIA.

COMPRESSOR.

Application filed July 5,

To all whom it may concern:

Be it known that I, MAXIMILIAN F. JURUIOK, a citizen of the United States, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented new and useful Improvements in Compressors (Case C), of which the following is a specification.

This invention relates to improvements in compressors especially designed for use in refrigerating apparatus of the type adapted for household and small industrial purposes.

An object of the present invention is the provision of a compressor which will operate without liquifying the refrigerant and in which the said refrigerant is used for cooling the compressor.

Another object of the invention is the provision of a compressor which operates with a single suction and a single discharge, but which provides a double compression between each suction and discharge.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure 1 is a longitudinal sectional view of a compressor constructed in accordance with the invention.

Figure 2 is a transverse sectional view on the line 2-2 of Figure 1.

Referring in detail .tothe drawings, wherein like characters of reference denote corresponding parts, the reference character 10 indicates a cylinder which is surrounded by a jacket 11 and whose bore is closed at each end by means of heads 12 and 13. The bore of the cylinder is of diiferent diameters so as to provide compression chambers 14 and 15 of different diameters, the latter being the smaller.

Operating within the compression chambers 14 and 15 is a piston having a relatively large end IG-and a small end 17. A rod 18 extends from the enlarged end 16 of the piston, through a suitable stufiing box 19.

Located in one end of the compression chamber 14 are suction operated valve controlled inlet ports, whose valves 20 admit refrigerant into the chamber 14: from the jacket 11 through passages 21, an inlet 22 being provided for supplying the refrigerant 1922. Serial No. 572,998.

to the jacket. The packing within the stuffing box 19 is arranged upon opposite sides of a member 23 which is provided with an annular passage 24 and radial ports 26, the latter extending from the passage 2 to the bore through which the rod 18 passes. The passage 24 also communicates with. a passage 26 having communication with the pas- Sage .21, so that any leakage of compression around the rod 18 will be collected by the member 23 and will return to the passage 21 to be again drawn into the compression chamber 14. I

M The piston is hollow so as to provide an inner chamber 27 having communication with the chamber 14 through ports 28. These ports are controlled by pressure operated valves 29. The chamber 27 is also in communication with the chamber 15 by means of a port 30 and this last mentioned port is controlled by a pressure operated valve 31. The bore of the cylinder is provided with a discharge port 32 which is normally closed by a spring pressed pressure controlled valve 33, the latter forming the head of the compression chamber 15. If desired, a separate cooling jacket 34 may surround the compression chamber 15 and a suitable cooling agent may circulate through this jacket by means of ports 35.

In the operation of the compressor, the refrigerant enters the jacket 11 through the inlet 22 and circulates around an annular passage 36 which surrounds the junctures of the compression chambers 14 and 15 and enters the jacket 11 proper through ports 37. At the same time the refrigerant within the annular passage 36 contacts with the periphery of the piston, the latter forming a portion of the walls of the passage 36. Upon one stroke of the piston, the valves 20 are opened by suction and a charge of re frigerant is drawn into the chamber 14.. Upon the return stroke, this charge is compressed and the valves 29 are opened under compression so that the refrigerant passes into the chamber 27 through the ports 28. The pressure of the former will open the valve 31 so as to permit the charge to enter the compression chamber 15 where it is again compressed, the compression within this chamber operating the valve 33 to permit of the discharge of the compressed charge through the port 32. Any leakage,

26 to be again directed into the compression chamber 14:, as will also any leakage along the rod 18, as previously explained.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is 1. A compressor embodying a cylinder closed at each end and provided with a bore of difierent diameters to define separate compression chambers, a valve controlled inlet for one of the chambers, a piston operating within the cylinder and having different diameters to fit the compression chambers, a chamber within the piston, means whereby communication will be established between the inlet compression chamber and piston chamber upon the compression stroke of the piston, valve controlled means establishing communication between the pis ton chamber and the other compression chamber and a valve controlled discharge port for the said other compression chamber.

2. A compressor embodying a cylinder closed at each end and provided With a bore of different diameters to define separate compression chambers, a valve controlled inlet for one of the chambers, a piston operating within the cylinder and having difierent diameters to fit the compression chambers, a chamber within the piston, means whereby communication will be established between the inlet compression chamber and piston chamber upon the compression stroke of the piston, valve controlled means establishing communication between the piston chamber and the other compression chamber, a discharge port and means including a pressure controlled movable end wall for the said other cylinder for controlling the discharge port.

In testimony whereof I affix my signature.

MAXIMILIAN F. J URUICK. 

